diff --git a/wayback-cdx-server/src/main/java/org/archive/cdxserver/processor/DupeTimestampBestStatusFilter.java b/wayback-cdx-server/src/main/java/org/archive/cdxserver/processor/DupeTimestampBestStatusFilter.java
index f491dceb54..16f3a72815 100644
--- a/wayback-cdx-server/src/main/java/org/archive/cdxserver/processor/DupeTimestampBestStatusFilter.java
+++ b/wayback-cdx-server/src/main/java/org/archive/cdxserver/processor/DupeTimestampBestStatusFilter.java
@@ -85,7 +85,8 @@ protected boolean include(CDXLine line) {
 
 		String timestamp = line.getTimestamp();
 		timestamp = timestamp.substring(0, Math.min(timestampDedupLength, timestamp.length()));
-		int httpCode = NumberUtils.toInt(line.getStatusCode(), WORST_HTTP_CODE);
+		final String statusCode = line.getStatusCode();
+		int httpCode = "-".equals(statusCode) ? WORST_HTTP_CODE : NumberUtils.toInt(statusCode, WORST_HTTP_CODE);
 
 		boolean isDupe = false;